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Public equity markets tend to interpret companies through broad narratives—cyclical or defensive, growth or value, share gainer or donor. These frameworks are useful, but they often overlook inflection points when structural change and management-led initiatives lead to improved fundamentals. Our investment process is designed to identify these kinds of opportunities and the misvaluation that comes with them.

In practice, mispricing often reflects a deeper disconnect between perception and reality. The following case studies illustrate how those disconnects are identified through fundamental research, sustainability analysis, and valuation discipline.

Each example involves a different sector, catalyst, and outcome, but all three share a common starting point: a gap between how the business was perceived and how it was evolving, which led to mispricing its stock

Case Study 1: Owens Corning

A Structural Opportunity Hidden in a Cyclical Industry

OC | Held March 2022 – May 2025

Entry Point: Why This Company, Why Now

In 2022, the building products sector was broadly viewed through a cyclical lens, with concerns centered on slowing housing demand and margin compression. Owens Corning, a building materials company, was positioned squarely within that narrative with exposure to residential construction via its insulation and roofing products and broader industrial exposure from its composite business.

However, this framing overlooked a more complex reality. Demand for insulation was increasingly driven by energy efficiency, supported by tightening building standards, rising energy costs, and decarbonization initiatives while a structural housing shortage supported continued new builds. Additionally, the company’s roofing segment was predominantly a repair-and-replace business, providing stability across cycles.

At entry, Owens Corning traded at ~5.5× forward EV/EBITDA—a 5-year low, roughly two standard deviations below its historical average, and a ~60% discount to the broader Industrials sector. With valuation reflecting a deeply negative cyclical outlook, the setup presented an opportunity to underwrite a business with structural demand characteristics and a credible management team.

Sustainability gains. Energy efficiency was becoming a durable demand driver while also internalized at Owens Corning. High use of recycled materials lowered reliance on virgin-materials prices and lowered the energy cost of production, further helped by growing use of renewable energy.

Margin trajectory misunderstood. Consensus expected contraction, underestimating pricing discipline, productivity gains, and operating leverage.

Cyclical buffers. Roofing durability and improved capital discipline reduced cyclicality and was not reflected in expectations.

The risk-reward was favorable:

  • Downside Protection: Valuation and estimates already reflected a severe cyclical downside based on macroeconomic concerns
  • Upside: Margin expansion driven by pricing discipline, operating leverage in the case of sustained demand, and cost and productivity improvements.
  • Re-rating potential: As execution demonstrated resilience, even partial normalization of valuation multiples would drive returns and offset margin compression.

What the market got wrong: Structural demand and margin expansion.

What happened: Revenues proved resilient from pricing discipline, while ongoing repair & replace supported roofing volumes. As a result, EBITDA margins expanded ~200 bps vs. the expected contraction.

Result: Multiple re-rated from 5.5× 6.9×, and the stock delivered an annualized return of +14.6%, outperforming both the Value and sector benchmarks.

The position was exited as:

  • Cyclical pressures began to re-emerge in residential end-markets, an area where they were inorganically expanding.
  • Valuation normalized with less room for margin expansion, reducing upside.
  • More attractive opportunities emerged.
Process Takeaway:

Structural demand reduced business cyclicality.

Source: FactSet. As of 03/31/2026

Source: FactSet. As of 03/31/2026

Case Study 2: Sprouts Farmers Market

Reframing a “Pandemic Beneficiary” as a Structural Compounder

SFM | Held March 2021 – March 2025

Entry Point: Why This Company, Why Now

In 2021, the natural foods specialty grocer Sprouts Farmers Market was viewed as a COVID-era beneficiary facing normalization risk. The stock traded at ~15× Forward P/E, a 20% discount to its historical average.

At the same time, new management had initiated a strategic repositioning:

  • Focus on health enthusiasts and innovation seekers
  • Private label expansion
  • Supply chain investment
  • Smaller, more efficient store formats

In our view, Sprouts represented a potential early-stage turnaround with identifiable catalysts.

Demand durability. Health-conscious consumers were growing and in search of unique products, driving strong customer loyalty (with lower price sensitivity than customers of conventional grocers), and supporting long-term growth.

Structural margin gains. Private label expansion, reduced promotion, and operational improvement—including local sourcing and reduced shrinkage—supported sustained margin expansion. Smaller store formats improved efficiency and margins—lowering build costs, reducing complexity, reinforcing brand differentiation, and supporting store growth.

The position was built across multiple entry points from 2021–2023 at ~13–15× P/E. The setup:

  • Downside: Valuation suggested stalled growth.
  • Upside: Execution on expansion plans and efficiency gains coupled with a recovery in same-store sales (SSS).
  • Re-rating potential: Multiple normalization with a return to historical growth driven by market improvement, company action, or a combination of both.

What the market got wrong: Structural growth vs. temporary COVID boost.

What happened: Same Store Sales (SSS) accelerated to +11.7% and gross margin expanded ~280 bps. Store count rose by ~22% to 443. Private label exceeded expectations, rising from 14% at initiation to 20% of revenues by 2023.

Figure 3. Sprouts Same Store Sales (%)

Source: Company filings. FactSet.

Unexpected Lift from Inflation:
From a year-on-year rate of approximately 1.5% at the time of our initial purchase, inflation accelerated sharply: +7.9% YoY by February 2022 and peaking at +9.1% YoY in June 2022. For a food retailer with strong pricing power in organic and specialty categories, this was a meaningful and unmodelled top-line tailwind in 2022–2023 that augmented stabilizing SSS and new store growth. SFM’s product mix — weighted toward fresh, organic, and specialty items where inflation was particularly acute — allowed the company to pass through price increases more effectively than conventional grocery peers. This created a bridge to the genuine volume-led SSS reacceleration that emerged from 2024 onward.

The position was exited as:

  • Valuation fully reflected the thesis.
  • Risk-reward was less compelling.
  • Fundamental momentum began to fade.
Process Takeaway:

Strategic vision and business initiatives created opportunity for long-term structural growth.


Source: FactSet. As of 03/31/2026

Source: FactSet. As of 03/31/2026

Case Study 3: Bank of New York Mellon

Recognizing Operational Transformation

BK | Portfolio Entry: October 2023

Entry Point: Why This Company, Why Now

In 2023, sentiment and valuation across the Financials sector was weighed down by regional banking stress, an aggressive Fed hiking cycle, and persistent fears of deposit flight. Global custody and asset servicing bank BNY Mellon was treated as another rate-sensitive bank rather than a fixed-income-centric, fee-driven business, deeply embedded in market infrastructure, and trading at a multiple below its 5-year average.

Beneath the simplified view of custody banks, BNY Mellon was undergoing a meaningful transformation under a new CEO—integrating platforms and simplifying operations with room to improve governance. This was more than cost-cutting; it was a shift toward a more scalable and profitable operating model.

Operating leverage. Platform integration, centralizing operations, and cost discipline were not fully reflected in expectations. From our perspective, these initiatives signaled improved attention to grow the business with disciplined resource allocation.

Business model resilience. High switching costs, longstanding client relationships, deeper involvement in mission-critical infrastructure, and expanding services in more asset classes supported the case for fee rate resilience and provided visibility and stability amid market turmoil.

At entry, BNY Mellon traded at ~0.8× P/B, ~8.5× P/E, and a deep discount to the sector. This setup implied a structurally challenged business. The investment opportunity rested on asymmetry:

  • Downside: The valuation reflected muted growth, limited operating improvements, and a conservative macro outlook.
  • Upside: Operating leverage driven by efficiency initiatives, improved fee income, and disciplined cost management supported meaningful EPS growth.
  • Re-rating potential: Successful execution of improved efficiency and resilient earnings would support a normalized multiple.

What the market got wrong: Earnings growth and operational improvement.

What happened: Sustained operating leverage over nine quarters contributing to profitability as measured by Return on Tangible Equity expanding from 21.6% in 2023 to 26% in 2025. EPS grew ~36% vs. ~10% expected

Result: P/B: 0.8× 1.9×; P/E: 8.5× 13.8× with earnings growth leading to a total return of 196% compared to just over 50% for Russell 1000 Value Index. 1

1 As of 03/31/2026

While we continue to own BNY Mellon, we have trimmed the position.

  • Valuation discount narrowing. Forward P/E discount to the Financials sector has compressed.
  • Position sizing discipline. Reduced active weight in line with current conviction level.
  • Opportunity cost increasing with capital reallocated to companies with stronger forward risk-reward.
Process Takeaway:

Operational improvement mispriced as structural stagnation.


Source: FactSet. As of 03/31/2026

Source: FactSet. As of 03/31/2026

Where the Process Repeats, and Where It Differs

The three examples presented here represent different sectors with differing business models and market catalysts. In each case, the starting point was the same: a misunderstanding of growth potential that resulted in misvaluation. Owens Corning was viewed as purely cyclical despite its structural demand drivers; BNY Mellon was treated as a stagnant franchise even as its operating model improved; and Sprouts was dismissed as a pandemic beneficiary rather than an emerging compounder. Instead, management-led initiatives would ultimately improve the profitability and durability of these businesses.

What Drove Investment Outcomes

Across all three, returns were driven by the same sequence:

  1. Variant perception. Identifying where consensus understanding was incomplete.
  2. Fundamental validation. Earnings, margins, or operating metrics evolving differently than expected.
  3. Valuation normalization. Multiple expansion as perception caught up to reality.

Sustainability analysis played a consistent role—not as a separate overlay, but as a tool to identify economically material drivers of demand, cost structure, and competitive positioning.

What Differed

The pattern repeated, but the source of mispricing varied:

Macro framing
(Owens Corning)

Strategic repositioning and consumer behavior

(Sprouts Farmers Market)

Operational execution

(BNY Mellon)

The path to validation also differed, sometimes requiring patience through macro noise, other times depending on execution milestones.

Final Thought

Existing market narratives can persist beyond their usefulness, creating durable gaps in market perception and underlying value. Investment opportunities emerge when deep investment analysis uncovers the mispricing of management-led action and market change.

Across cycles and sectors, our process is consistent: identify where perception and fundamentals have diverged, determine whether that gap is reflected in valuation, and establish positions when the risk-reward is asymmetric. From there, we allow fundamentals to close the gap and, over time, reprice the asset.

The Russell 1000 Value Index is a capitalization-weighted index of the 1000 largest publicly-traded US companies that have low price-to-book, price-to-earnings, and price-to-cash flow valuations relative to a broader universe of companies. The Index is unmanaged and does not incur management fees, transaction costs, or other expenses. The composition of this portfolio is different from the composition of the Index because of differences in sector and industry exposure, risk, volatility, and holdings

Published On: May 19, 2026

This piece is intended as an editorial review of a survey of risk considerations and does not constitute investment advice, a solicitation, or an offer to buy or sell any security. Past performance does not guarantee future results. All investments involve risk, including the risk of loss of principal.

References to third-party research, publications, and data sources are provided for informational purposes only. Boston Common Asset Management does not warrant the accuracy or completeness of third-party information cited herein. Readers should consult original sources and qualified professional advisors before making any investment decision.